8.8 Grade M12x40mm Full Threaded Left Hand Thread Hex Head Bolt Black 2pcs M8x130mm There are filters in the

There are filters in the threads to filter out particulates

1 Pcs 130mm Speaker Dust Cap

Material: Zinc Alloy Chrome Finish

large tension

8.8 Grade M12x40mm Full Threaded Left Hand Thread Hex Head Bolt Black 2pcs M8x130mm There are filters in theMade of carbon steel material,black oxide finish,hex head,left hand reverse thread design. Fixing component, industrial and construction fasteners. To tighten a reverse threaded screw, you turn it counter clockwise. To loosen a reverse threaded screw, you turn it clockwise. Used widely in home, office and factory appliance, communication equipments, ship assembly and other machinery industry.